The "AR" in AR-15 (and other AR designated rifles) does not stand for "Assault Rifle" nor does it stand for Automatic Rifle. What it does stands for is Armalite Rifle, Armalite originally invented it and later licensed it to Colt. Though just "AR" could for me stand for Assault Rifle or even Automatic Rifle, it would then also stands for American Rights, American Rifle, American Rifleman and Arizona Rick (that's me, aka Citizen Rick). I'm sure there are many things it could also stand for with me, however when it comes to AR platformed rifles, it only stands for one thing;